View Compilation Error

0_0_29811755_22252.cpp: In function 'void pushup(int, int, int)':
0_0_29811755_22252.cpp:26:56: error: 'ro' was not declared in this scope
  tree[root].sumv = tree[tree[root].L].sumv + tree[tree[ro
                                                        ^
0_0_29811755_22252.cpp:26:56: error: expected ']' at end of input
0_0_29811755_22252.cpp:26:56: error: expected ']' at end of input
0_0_29811755_22252.cpp:26:56: error: expected '}' at end of input